嵌入式阻尼环筋开口圆柱壳的振动性能分析

VIBRATION ANALYSIS OF THE EMBEDDED CO-CURING DAMPING COMPOSITE RING-OPENING STIFFENED CYLINDRICAL SHELLS

本文在应用一阶剪切变形壳理论的基础上,采用共固化工艺的嵌入式阻尼复合材料环筋开口圆柱壳作为研究对象,加强筋作离散元素处理,对此结构的动态特性进行了研究。应用Rayleigh-Ritz能量法和Navier双级数法,推导嵌入式共固化阻尼复合材料环筋开口圆柱壳的应变能和动能表达式,建立其自由振动的控制方程;另外,利用ANSYS建模获得此结构的模拟结果,对两者结果进行了比较,验证了本文方法的有效性。探讨了不同筋条高度及阻尼夹芯层厚度对本文所述环筋开口圆柱壳性能的影响。研究结论对轻质高刚度大阻尼的复合材料结构件的设计及应用有一定的参考价值。

Based on the first-order shear deformation shell theory,the dynamic characteristics of the embedded co-curing damping composite ring-opening stiffened cylindrical shells are studied,and the stiffening ribbings are treated as discrete elements.The Rayleigh-Ritz energy method and Navier method are used to derive the strain energy and kinetic energy expression of the embedded co-curing damping composite ring-opening stiffened cylindrical shells,and the control equation of free vibration is established.The simulation results obtained by ANSYS modeling are used to verify the correctness of the formulas in this paper.Theoretically,the effects of different rib heights and damping sandwich layer thickness on the performance of the cylindrical shell are further discussed in this paper.The research conclusions have certain references for the design and application of lightweight,high stiffness and large damping composite structural members.